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Five Kingdom Classification

Description: This test will help the students to revise the topics thoroughly.
Number of Questions: 15
Created by:
Tags: Protista Kingdom- Fungi Classification of Fungi Algae Thallophyta Virus
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Which of the following micro organisms is a bioluminescent fungi?

  1. Mycena asterina

  2. Aequorea victoria

  3. Armillaria

  4. Bolitaenidae

  5. Sea pens

Show answer
Correct Option: A
Explanation:

Mycena asterina is a species of agaric fungus. It grows singly or scattered on fallen leaves in Atlantic forests. The fruit bodies of the fungus are bioluminescent.

The microorganism capable of producing paralytic shellfish poisoning is which of the following?

  1. Alexandrium

  2. Gymnodinium

  3. Noctiluca scintillans

  4. Pfiesteria

  5. Symbiodinium

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Correct Option: A
Explanation:

Alexandrium is a genus of dinoflagellates, with many species related to toxin production leading to Paralytic shellfish poisoning. The dinoflagellate cysts produced by this species are considered much more toxic than swimming cells.

Which of the following is commonly known as the fool's mushroom?

  1. Amanita ocreata

  2. Amanita subjunquillea

  3. Amanita verna

  4. Amanita virosiformis

  5. Amanita ovoidea

Show answer
Correct Option: C
Explanation:

This fungus is commonly known as the fool's mushroom. It is a deadly poisonous basidiomycete fungus.

Which of the following alga has two-layered cortex and long narrow spores?

  1. C. subglobisporus

  2. C. sinensis

  3. C. lijiangensis

  4. C. colensoi

  5. C. crassimurus

Show answer
Correct Option: E
Explanation:

This algae is golden coloured, plicate and has external hairs. It has radially wrinkled dark brown peridioles. Has a two-layered cortex and long narrow spores.

Yeasts are eukaryotic microorganisms classified in the kingdom Fungi. Which of the following is true yeast, not a dimorphic fungi?

  1. Coccidioides immitis

  2. Blastomyces dermatitidis

  3. Histoplasma capsulatum

  4. Paracoccidioides brasiliensis

  5. Candida

Show answer
Correct Option: C
Explanation:

H. capsulatum is a dimorphic fungus that exists as a mold in soil and as a yeast in tissue. Candida and Cryptococcus are not dimorphic fungi they are true yeast.

A virus is a small infectious agent capable of replicating only inside living cells. Which of the following viruses contains a single linear double-stranded segment of DNA as its genome?

  1. Adenoviruses

  2. Epstein–Barr virus

  3. Poxviruses

  4. Parvovirus

  5. Rotavirus

Show answer
Correct Option: C
Explanation:

Poxviruses viruses can infect both vertebrate and invertebrate animals. The virion is exceptionally large, and carries its genome in a single, linear, double-stranded segment of DNA.

Bacteriophage are obligate intracellular parasites that multiply inside bacteria. Which of the following scientists discovered bacteriophages?

  1. Frederick Twort

  2. Ernest William Goodpasture

  3. Howard Temin

  4. Wendell Meredith Stanley

  5. Charles Chamberland

Show answer
Correct Option: A
Explanation:

Frederick Twort discovered a group of viruses capable of infecting bacteria, which are also known as bacteriophages.

Which of the following statements regarding HIV is INCORECT?

  1. HIV is a complex RNA virus.

  2. The lipid bilayer is studded with a number of host-cell lipids and proteins.

  3. HIV has a characteristic dense, cone-shaped nucleocapsid.

  4. HIV has genes whose products contribute to the complex regulation and replication of the virus.

  5. RNase H, integrase and protease are the major HIV enzymes.

Show answer
Correct Option: B
Explanation:

The lipid bilayer of HIV is  studded with a number of host-cell proteins only during the budding process.

Viral neuraminidase is a type of neuraminidase found on the surface of influenza viruses. Which of the following can be excluded from the functions of neuraminidase?

  1. It allows virus to permeate mucin of the host cell.

  2. It destroys the haemagglutinin receptors in a host cell.

  3. Viral neuraminidase cleaves terminal neuraminic acid on the surface of the infected cell.

  4. It interacts with cell-membrane receptors containing N-acetylneuraminic acid.

  5. It prevents self-aggregation of virions.

Show answer
Correct Option: D
Explanation:

The haemagglutinin interacts with cell-membrane receptors containing N-acetylneuraminic acid (sialic acid).

Which of the following statements regarding the phathogenesis of influenza viruses is INCORRECT?

  1. Incubation period varies from 1-4 days.

  2. Release of IFN from infected cells protect both adjacent and distal cells.

  3. Cell damage leads to the attraction of phagocytes.

  4. The ciliated cells of respiratory tract are main cites of infection.

  5. Viral NA increases the viscosity of the mucous film.

Show answer
Correct Option: D
Explanation:

Viral NA lowers the viscosity of the mucous film, promoting the spread of virus containing fluid to lower portions of the tract.

Which of the following statements regarding the herpes virus is FALSE?

  1. The herpes virus has an 18 hour replication cycle.

  2. Expression of the genome is strictly regulated in herpes virus.

  3. The virus enters the cells through cellular membrane fusion.

  4. The genome is a 120–230 kbp double-stranded, circular DNA.

  5. Viral DNA is synthesised by the help of a large number of viral enzymes.

Show answer
Correct Option: D
Explanation:

  The genome of a herpes virus is a 120–230 kbp double-stranded, linear DNA with repeated sequences located at each flank and certain other regions.

Upon diagnosis, it was confirmed that Mr. Verma is suffering from oropharyngeal cancer. Which of the following is a causative agent of oropharyngeal cancer?

  1. Hepatitis B virus

  2. Human papillomavirus

  3. Epstein-Barr virus

  4. Human herpes virus 8

  5. Human T-lymphotrophic virus-1

Show answer
Correct Option: B
Explanation:

Human papillomavirus (HPV) is a major cause of cervical, anal, penile, and oropharyngeal cancer. The most common clinically significant manifestation of persistent genital HPV infection is cervical intraepithelial neoplasia (CIN).  

Which of the following fungal cultures permits the growth of virtually all clinically relevant fungi?

  1. Brain-heart infusion agar

  2. Czapek’s agar

  3. Inhibitory mold agar

  4. Potato Dextrose Agar

  5. Potato flake agar

Show answer
Correct Option: A
Explanation:

It is a nonselective fungal culture medium that permits the growth of virtually all clinically relevant fungi. It is used for the primary recovery of saprophytic and dimorphic fungi.

Which of the following selective and differential media is used for the inhibition of gram negative rods?

  1. Thioglycollate broth

  2. Cycloserine cefoxitin fructose agar

  3. Anaerobic phenylethyl alcohol agar

  4. Bacterioides bile esculin agar

  5. Laked Kanamycin-vancomycin blood agar

Show answer
Correct Option: C
Explanation:

Anaerobic phenylethyl alcohol agar is selective for inhibition of gram negative rods and swarming by some clostridia.

Measles is usually a disease of childhood and is followed by life-long immunity. Which of the following statements does NOT characterises measles virus?

  1. Measles virus have two types of envelope spikes.

  2. Measles virus is a paramyxovirus.

  3. Single serotype

  4. Cellular receptor of measles virus is CD48 molecule.

  5. Virus RNA polymerase transcribes the negative-strand genome to mRNA.

Show answer
Correct Option: D
Explanation:

It is incorrect. Cellular receptor of measles virus is CD46 molecule. Adsoprtion to the cell surface is through Hemagglutinin.

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